Aluminum Cam & Groove Adapter, Inch Dust Plug

Keeps the coupler end sealed and protected when it's not connected to anything. It fits into a standard cam and groove coupler, and once you press the cam levers down it locks in place with normal hand pressure. The body is cast aluminum, the cam levers are brass, and it uses Buna-N seals, so it holds up well in liquid handling setups. Worth noting that the safety pin feature adds an extra layer here too. Cast-in lugs on the coupler let you run a pin through once it's seated, which keeps it from backing out accidentally until you pull the pin.

This cam and groove adapter dust plug is equipped with Buna-N seals, which should provide a good barrier against liquids.